Method of and means for converting the electric arc into an elongated flame



Nov. 14, 1933. E. wlsT 1,935,593

METHOD OF AND MEANS FOR CONVERTING THE ELECTRIC ARC INTO AN ELONGATED FLAME Filed March 28, 1929 letented Nov. 14, 1933 ltlETHOD OF AND MEANS FOR CONVERTING THE ELECTRIC ARC INTO AN ELONGATED Engelbert Wist, Vienna, Austria, assignor to the firm Pressllcht-Patentverwertungsges m. b. 11., Vienna, Austria Application March 28, 1929, Serial No. 350,582, and in Austria February 26, 1929 8 Claims. (Cl. 219-8) This invention relates to a method of and any suitable form, for instance a bundle o1 fine means for converting the electric are into an parallel tubes or wires, or a plug of cotton wool, elongated flame suitable for welding and heating asbestos or the like. By this arrangement the as well as for chemical and metallurgical purgas will be discharged by the nozzles 14 at a poses, and the invention consists essentially in constant pressure and maintain a constant flame.' ,3 forming the arc between concentric carbon elec- In the arrangement according to Fig. 3 a pipe trodes and passing a blast of gaseous hydrocoil is arranged outside the reduced end of the carbon across the arc from between the electrodes. outer electrode and connected by means of a The gas is adapted to be decomposed by the pipe 21 to an annular pipe 22 arranged about '10 are and to deposit carbon on the electrodes so the electrode 11 inside the electrode 12 and as to retard the consumption of the latter, while formed with nozzles 22. the gas mixture obtained by the reaction will The stability and correct shape of the flame neutralize the flame and render it more efficient 9 may be ensured by providing the outer elecand suitable for the various purposes for which trode with a flared mouth which may either be '15 it is employed. conical or bowl-shaped. Fig. 1 shows the elec- I 26 a sectional view of a suitable form of electrodes, an elongated flame, comprising a solid and a In order to prevent an excessive deposition trode formed with a bowl-shaped mouth 10. The of carbon on the electrodes, a hydro-carbon comone electrode may consist of a suitable metal. pound containing oxygen is preferably employed. I claim:

'Fig. l of the accompanying drawing represents 1. A device for converting the electric are into Fig. 2 is a diagrammatic view of a device for tubular electrode arranged concentrically, means carrying out the invention including an arrangefor passing current through the electrodes so as ment for producing the gas, and to form an arc between them, a pipe coil ar- Fig. 3 is a diagram of a. modified arrangement. ranged so as to be heated by the arc, a tank 25. The electric arc is formed between concentric connected to one end of the coil for supplying I carbon electrodes 11 and 12 and subjected to a liquid to the latter, and nozzles connected to blast of gas which passes across the are from the other end of the coil and arranged inside the between the electrodes. The consumption of the tubular electrode so as to pass the gas produced electrodes is reduced by employing'for the blast by the coil across the arc. I

'30 a gaseous hydro-carbon compound adapted to be 2. The structure claimed in claim 1 in comdecomposed by the arc and to deposit carbon bination with a regulating valve arranged in the on the incandescent parts of the electrodes. By conduit between the tank and the coil, and means this arrangement the flame will also be neutralin the same conduit, between the valve and the ized and produce an ideal welding joint. In order coil, for retarding the flow of the liquid.

35 to restrict the carbon deposition, the gas may be 3. A device as claimed in claim 1 wherein the mixed with oxygen. A mixture of coal gas and nozzles are arranged symmetrically about the inhydrogen or steam may be employed or an alconer. Solid electrodehol compound for instance ethyl or methyl al- 4. A device as claimed in claim 1 wherein the cohol with or without water. Owing to this end of the outer electrode is bowl-shaped.

40 rebuilding of the carbons, a renewal of the lat- 5. Means for converting an electric are into ter need not take place except at large intervals. an elongated flame, comprising concentric elec- The gas blast is advantageously obtained from trodes, between which the arc is formed, the a liquid which is evaporated by the heat, for outermost electrode confining the are against instance by one of the arrangements shown in spreading in other than a predetermined direc- 45 Figs. 2 and 3. The liquid 13 is contained in a tion, and means for directing a gaseous hydrotank 15 having an air inlet 23, and descends carbon longitudinally of and within the outer through a pipe 16 to a coil 18 which, according electrode and surrounding the inner electrode to Fig. 2, surrounds the electrode 11 inside the and across the arc and in the direction of deelectrode 12. The gas formed by the heat is sired arc elongation.

50 emitted from the coil through nozzles 14, and 6. The method of converting an electric passes out through the arc gap so as to extend are into an elongated flame, with the arc of a type the are into a flame. The nozzles 14 are disdeveloped between concentric electrodes, said tributed uniformly about the inner electrode. method consisting in passing a blast of a gas Between a regulating valve 1'? and the coil l8the containing hydrocarbon across the electric arc,

55 pipe 16 may contain retarding elements 19 01 the decomposition of the gas incident to its pas- 8. The method of converting an. electric are into an elongated flame, with the are of a type developed between concentric electrodes, said method consisting in passing a blast of a water gas across the electric arc, the decomposition of the gas incident to its passage through the' arc depositing carbon on the electrodes.

ENGEIBERT wIs'rQ 

